Url parameter not change

Hello

Url parameter value not changed without cache clear below is steps for reproduce issue.

First Visit : http://www.example.com/?utm_source=newsletter&utm_medium=email&utm_campaign=magento_migration_offers

And then changes parameter value like below

Second Visit : http://www.example.com/?utm_source=newsletter&utm_medium=email&utm_campaign=magento_migration_offers

In Page template or footer.php try to get parameter value as per below.

echo $_REQUEST[‘utm_source’];